Research on Power Supply of Electric Isolation Valve in the Containment of CPR1000 Unit

The rationality of power supply mode of electric isolation valve in the containment of CPR1000 unit is analyzed, and the improved mode of power supply is put forward. In this study, a domestic CPR1000 unit was designed, and according to the requirements of SOP, the electric isolation valve in each containment was analyzed in the case of large LOCA, to judge whether it can perform its design function in such superposed working condition. The research results show that some of the electric isolation valves can not normally fulfill the requirements of the guidance operation and response under this condition. Therefore, this paper proposes an improved power supply mode to ensure the integrity of the containment and control the unit status.